add CLI commands for coordinate API where it makes sense

[rossiam]

Currently there is no support in the CLI for any of the coordinate endpoints. The "subscription" endpoints are meant to be called in the context of an installed app and should not be included.

https://developer.smartthings.com/docs/api/public/#tag/Coordinate

This issue was split off from #478

Original text from #478:

It would be also be handy to be able to access the services endpoint, or the coordinate API as the API reference seems to call it, from the CLI.